Silicon Phononic Crystal Directional Coupler: Design Framework, Feasibility Bounds, and Manufacturability Workflow (v1.0)

This repository accompanies a first-draft component paper on a silicon phononic crystal (PnC) directional coupler intended as a routing primitive for guided phononic modes. The release provides (i) the manuscript draft, (ii) reproducible analysis artifacts (data + figures) supporting coupling-curve extraction and manufacturability/yield diagnostics, and (iii) a design framework based on coupled-mode modeling and feasibility bounds. Important scope note (data provenance): the coupling-curve dataset data/gd_curve.csv included in this v1.0 release is explicitly labeled SYNTHETIC_DEMO_ONLY and is provided solely to validate the workflow, plotting, and tolerance/yield methodology. Geometry-specific coupling curves inferred from FEM eigenfrequency extraction (supermode splitting) are planned for a subsequent release and will replace the synthetic placeholder dataset. Note: This dataset is a supplement to a first-draft component manuscript . Code in this archive is additionally licensed under MIT (see LICENSE-MIT.txt). Data/figures/manuscript are CC BY 4.0.本仓库配套一篇关于硅基声子晶体（phononic crystal, PnC）定向耦合器的组件论文初稿，该耦合器旨在作为导声模式的路由基元。本次发布包含以下内容： (i) 论文初稿； (ii) 支撑耦合曲线提取与可制造性/良率诊断的可复现分析制品（数据与图表）； (iii) 基于耦合模建模与可行性边界的设计框架。 重要范围说明（数据来源）： 本v1.0版本中包含的耦合曲线数据集data/gd_curve.csv被明确标注为SYNTHETIC_DEMO_ONLY（仅用于演示的合成数据），仅用于验证工作流程、绘图方法以及容差/良率分析流程。通过有限元法（Finite Element Method, FEM）本征频率提取（超模分裂）得到的针对特定几何结构的耦合曲线，将在后续版本中发布并替代当前的合成占位数据集。 备注： 本数据集为一篇组件论文初稿的补充材料。本归档中的代码采用MIT开源许可协议（详见LICENSE-MIT.txt）；数据、图表与论文文稿采用CC BY 4.0（知识共享署名4.0国际许可协议）。